-85.15% is the change from 936 to 139
Calculation steps:
[( 139 - 936 ) ÷ 936] x 100 = -85.15%
Formula
Percentage change = [(139 - 936) / 936] x 100
Subtract the new number by the original number
139 - 936 = -797
-797 ÷ 936 = -0.8514957264957265
-0.8514957264957265 x 100 = -85.15%